As Project Runway gears up for its 10th season, host Heidi Klum is looking back at the show’s fashion triumphs, sewing disasters, and awe-inspiring designs in the new book: Project Runway: The Show That Changed Fashion.

Klum, 39, talked to PARADE about her favorite Runway moments and what’s in store for season 10. On her favorite Project Runway memory. “I have to say the very first episode because it was when Austin Scarlet made the cornhusk dress. We were debating for a few days if we should make that the first challenge. We sent the contestants to the grocery store with $50, and we were worried that it might turn into an arts and crafts project, but it was perfect because it set the tone of the show and proved that these designers could actually make real-looking fashion with unconventional materials. I will never forget that.”

On how the show influences fashion. “Fashion always changes. I don’t think that the show necessarily changed fashion. I think that people understand fashion more because of it. They understand what it takes to make a garment now.” On walking the runway vs. judging the runway. “I like all of it. I’ve been lucky that I could do it all. Most models get to walk the runway and that’s it, or they get to shoot for magazines, but never really have a voice. I always did — even back in the days when I was a fit model for a catalogue. Even though they didn’t ask me, I would always say what was on my mind when it came to design.”

On who has the better catchphrase: Tim Gunn’s “Make It Work,” or Heidi’s “Auf Wiedersehen.” “I think they’re both great! They’re both pretty memorable. They just kind of happened. Nothing gets written for us. We don’t have people who tell us what to say, so I think the public made them as big as they have become. When we were thinking about how I was going to send the designers home, it was ‘Get off my runway,’ or ‘You’re out,’ ‘You didn’t make the cut,’ but I have an accent and I’m German, so I said, ‘Why don’t I just say auf wiedersehen?'”

On the favorite piece of clothing she owns. “I have some favorite jeans or some black, easy, sexy dresses that I like. Elizabeth and James make some that I like. They are great staples that will never go out of style.”

On what makes a woman beautiful. “Happiness and being positive. I always see the glass half full instead of half empty. You probably wouldn’t think that I am that way because I’m always bitching when I’m on the show, but I’m really a positive person.”

On season 10 of Project Runway. “We have some really great designers. I think we have two or three breakout stars, and of course, we have some drama. We had two designers who left in the middle of the night, which we never had happen before. They literally packed up their bags and left to our surprise. They never even said goodbye. They just took off. They just couldn’t make it work! They were overwhelmed by it all. It is tough. People don’t understand how tough it really is.”

Season 10 of Project Runway premieres Thursday, July 19 at 9/8c on Lifetime.